The pregnancy is resetting because exploration events are disabled.
Exploration events are disabled because your gamestate thinks you should be inside the Stellar Tether; FOUGHT_TAM is set, but STELLAR_TETHER_CLOSED is not. You may have cheat-teleported out, or found a crack in the coverage of end-events that doesn't set the STELLAR_TETHER_CLOSED (which I doubt, because I would expect we would have more reports pointing out weirdness with the Tether dungeon), or the game may have had to failsafe-move you out of the dungeon for some reason at some point I guess.
If you can open the console you put either of these in to "fix" it:
flags.FOUGHT_TAM = undefined;
flags.STELLAR_TETHER_CLOSED = 1;
The former will make the game think you never entered the tether dungeon, the latter will essentially "complete" the dungeon.